This has happen to me 3 times over the course of 30 days (2800 miles) more than 2/3 of that AP.
Today: while driving about 55mph, car slam the brakes with no one in front. When i noticed the car was about 30. I floored the pedal to avoid an accident, looked back and luckily no one behind me. The car in front of me had to be atleast 150-200 ft.
2nd time: was at 70mph. Car slammed on brakes for no reason, or so I thought. 2 secs later, i noticed the car in front of the car in front of me swirled off the road to avoid hitting the third car. This incident happened at 6 AM so probably saved my life. I’m not sure how the car detected that far, with interaction of 3 cars in front of me.
First time: auto pilot around 75 mph, car slowed down to 50 on a small turn, wasnt sure why, resume the trip and took over from AP.
The today incident shooked me up, I do admit I was half of sleep.